\begin{tabular}{l*{6}{c}}
\hline\hline
          &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}&\multicolumn{1}{c}{(6)}\\
          &\multicolumn{1}{c}{ProtectEnvir}&\multicolumn{1}{c}{ProtectEnvir}&\multicolumn{1}{c}{ProtectEnvir}&\multicolumn{1}{c}{ProtectEnvir}&\multicolumn{1}{c}{ProtectEnvir}&\multicolumn{1}{c}{ProtectEnvir}\\
\hline
main      &         &         &         &         &         &         \\
Strong\_FTR&   -0.324&   -0.221&   -0.221&   -0.221&   -0.519&   -0.091\\
          &  (0.155)&  (0.129)&  (0.137)&  (0.059)&  (0.150)&  (0.126)\\
\hline
\(N\)     &    61029&    61029&    61029&    61029&    61029&    61029\\
prob      &         &         &         &    0.119&         &         \\
\hline\hline
\multicolumn{7}{l}{\footnotesize Standard errors in parentheses}\\
\end{tabular}
